Beijing's architecture is a scene of extremes: on one end are Rem Koolhaas's multibillion-dollar structures; on the other, Dai Haifei's $964 sleep-pod — which the 24-year-old architect built because he couldn't even afford to live in the city he helps shape.

Beijing's architecture is a scene of extremes: on one end are Rem Koolhaas's multibillion-dollar structures; on the other, Dai Haifei's $964 sleep-pod — which the 24-year-old architect built because he couldn't even afford to live in the city he helps shape.